language: de

Molekül- und Kristallstrukturen des Dibrom- und Dijodmaleinsäurethioanhydrids

Walter Gonschorek
Institut für Kristallographie der Technischen Hochschule Aachen (BRD)
Z. Naturforsch. 55a, 14—17 (1980);

[eingegangen am 26. November 1979]

[Herrn Prof. Dr. H. Hintenberger zum 70. Geburtstag gewidmet]

[Crystal Structures of Dibrom- and Diiod Moleic Acid Thioanhydride]

The molecular and crystal structures of dibrom maleic acid thioanhydride and diiod maleic acid thioanhydride have been determined by means of single-crystal X-ray intensities. The crystal structures are isomorphous and have the space group P4i2i2 (enantiomorphous with P4a2i2). The lattice constants are a — 7.643 A, c = 12.166 A (DBMTA) and a = 7.816 A, c — 12.348 A (DIMTA). The five-membered rings of the molecules are planar with maximum deviations of 0.003 A (DBMTA) and 0.005 A (DEMTA). Adjacent molecules are held together by van-der-Waals-forces.

Zum Verständnis der Korrelation zwischen Mole-